Explanation:

- (A) GDP growth: This is indeed one of the objectives of a government budget, as effective budgeting can stimulate economic growth by allocating resources efficiently.

- (B) Reallocation of resources: The government budget aims to reallocate resources to achieve desired economic and social outcomes, like improving public welfare or supporting key sectors.

- (C) Balanced regional growth: Achieving balanced regional growth is also an objective of government budgets. It aims to reduce regional disparities and promote equitable development.

- Option:1, A and B: Excludes the balanced regional growth objective.

- Option:2, A and C: Excludes the reallocation of resources objective.

- Option:3, A, B and C: Includes all the objectives mentioned, making it the correct choice.

- Option:4, Only A: Excludes both B and C, which are also significant objectives.